Prolactin secretion and ovarian function in cycling and non-cycling African female elephants (Loxodonta africana)

Yuki Yamamoto, Tatsuya Yamamoto, Gen Watanabe, Natsuki Yuto, Megumi Keio, Etsuo Narushima, Masayuki Katayanagi, Risa Nakao, Syu Morikubo, Yuko Sakurai, Mikako Kaneko, Saroch Kaewmanee, Kazuyoshi Taya